rust/tests/ui/impl-trait/in-ctfe/array-len.rs

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//! Check that array lengths can observe associated types of opaque types
//@ check-pass
trait MyTrait: Copy {
const ASSOC: usize;
}
impl MyTrait for u8 {
const ASSOC: usize = 32;
}
const fn yeet() -> impl MyTrait {
0u8
}
const fn output<T: MyTrait>(_: T) -> usize {
<T as MyTrait>::ASSOC
}
fn main() {
let x = [0u8; output(yeet())];
println!("{:?}", x);
}